JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / bytecode / StructureStubClearingWatchpoint.h

diff --git a/bytecode/StructureStubClearingWatchpoint.h b/bytecode/StructureStubClearingWatchpoint.h
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+/*
+ * Copyright (C) 2012 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef StructureStubClearingWatchpoint_h
+#define StructureStubClearingWatchpoint_h
+
+#include "Watchpoint.h"
+#include <wtf/Platform.h>
+
+#if ENABLE(JIT)
+
+#include <wtf/FastAllocBase.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+namespace JSC {
+
+class CodeBlock;
+class WatchpointsOnStructureStubInfo;
+struct StructureStubInfo;
+
+class StructureStubClearingWatchpoint : public Watchpoint {
+    WTF_MAKE_NONCOPYABLE(StructureStubClearingWatchpoint);
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    StructureStubClearingWatchpoint(
+        WatchpointsOnStructureStubInfo& holder)
+        : m_holder(holder)
+    {
+    }
+    
+    StructureStubClearingWatchpoint(
+        WatchpointsOnStructureStubInfo& holder,
+        PassOwnPtr<StructureStubClearingWatchpoint> next)
+        : m_holder(holder)
+        , m_next(next)
+    {
+    }
+    
+    virtual ~StructureStubClearingWatchpoint();
+    
+    static StructureStubClearingWatchpoint* push(
+        WatchpointsOnStructureStubInfo& holder,
+        OwnPtr<StructureStubClearingWatchpoint>& head);
+
+protected:
+    void fireInternal();
+
+private:
+    WatchpointsOnStructureStubInfo& m_holder;
+    OwnPtr<StructureStubClearingWatchpoint> m_next;
+};
+
+class WatchpointsOnStructureStubInfo : public RefCounted<WatchpointsOnStructureStubInfo> {
+public:
+    WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)
+        : m_codeBlock(codeBlock)
+        , m_stubInfo(stubInfo)
+    {
+    }
+    
+    ~WatchpointsOnStructureStubInfo();
+    
+    StructureStubClearingWatchpoint* addWatchpoint();
+    
+    static StructureStubClearingWatchpoint* ensureReferenceAndAddWatchpoint(
+        RefPtr<WatchpointsOnStructureStubInfo>& holderRef,
+        CodeBlock*, StructureStubInfo*);
+    
+    CodeBlock* codeBlock() const { return m_codeBlock; }
+    StructureStubInfo* stubInfo() const { return m_stubInfo; }
+    
+private:
+    CodeBlock* m_codeBlock;
+    StructureStubInfo* m_stubInfo;
+    OwnPtr<StructureStubClearingWatchpoint> m_head;
+};
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)
+
+#endif // StructureStubClearingWatchpoint_h
+